A microprocessor is a multipurpose programmable logic device which reads the binary instructions from a storage device called memory accepts binary data as input and process data according to the instructions and gives the results as output. It is an 8bit microprocessor designed by intel in 1977 using nmos technology. The address bus is a group of 16 lines generally identified as a0 to a15. Lecture notes on microprocessors and microcomputer download. Department of mca lecture note microprocessor and assembly. The microprocessor is in many ways similar to the cpu, but includes the logic circuitry, including the control unit, on one chip. These microprocessors dont have ram, rom, and other peripheral on the chip. Devices are accessed using in and out instructions. A microprocessor, sometimes called a logic chip, is a computer. Introduction to microprocessors lpu distance education. The microprocessor is one of most known subject is computer engineering branch. Lecture notes on microprocessors and microcomputer. The processor pushes the pc on the stack before branching to the indicated address.
It has 16bit address bus and hence can address up to 216 65536 bytes 64kb memory locations through a 0a 15. The is a binary compatible follow up on the it is a large and heavy desktop box, about a 20. Mar 30, 2021 microprocessor and microcontrollers notes what are microprocessor and microcontrollers. In addition to the above mentioned registers intel 8085 microprocessor also. Instead of 80586, intel came out with a new processor namely pentium processor. The intel 8085ah is a complete 8bit parallel central processing unit cpu. The intel 8085 a is a complete 8 bit parallel central processing unit. The microprocessor 8085 followed by 8080, with a few more added. This was amongst the most popular microprocessors of all time. Moorthi professorece unit i the 8085 microprocessor. May2008 opcode fetch, memory read, memory write, io read, io write, interrupt acknowledge, bus idle. A microprocessor is a controlling unit of a microcomputer, fabricated on a small chip capable of performing arithmetic. Lecture note on microprocessor and microcontroller theory. Each instruction is represented by an 8bit binary value.
When combined with other integrated circuits that provide storage for d. Ee8551 notes microprocessors and microcontrollers to impart knowledge on the following topics architecture of. Lecture note on microprocessor and microcontroller theory vssut. The microprocessor can be divided into three segments for the sake clarity, arithmeticlogic unit alu, register array, and control unit.
Draw and explain the architecture of 8085 in detail. Its data bus width is 8bit and address bus width is 16bit, thus it can address 216 64 kb of memory. Microprocessor and microcontrollers notes pdf 2021 btech. Notes for microprocessor mp by verified writer lecture notes, notes, pdf free download, engineering notes, university notes, best pdf notes, semester, sem, year, for all, study material. Pdf overview of interfacing data converters with 8085. A microprocessor is an ic that has only the cpu inside them i. A peripheral may be a lcd display or analog to digital converter or any other. Interface a 6264 ic 8k x 8 ram with the 8085 using nand gate decoder such that the starting address assigned to the chip is 4000h. These notes for ee electrical engineering are all hand written and will give you an overview of the syllabus as well as the key topics that need to be studies on the subject 8085 microprocessor. The first 8 lines of address bus and 8 lines of data bus are multiplexed ad0 ad7. Draw the architecture of 8085 and understand the functions of different pins of 8085. Lecture note on microprocessor and microcontroller theory and.
I syllabus introduction to 8085 intel 8085 microprocessor. Instruction set of 8085 an instruction is a binary pattern designed inside a microprocessor to perform a specific function. Students will also learn the interfacing of memory and io devices with a microprocessor. Tutorial on introduction to 8085 architecture and programming. Evolution of microprocessor and types 8085 microprocessor, salient features of 8085 architecture of 8085 functional block diagram, pin description. Microprocessors and microcontrollersarchitecture of microprocessors. Unit i 8085 and 8086 processor introduction to microprocessor. You need adobe reader to open these files as they are in pdf format. Introduction microprocessor is a central processing unit cpu etched on a single chip.
Pin diagram and pin description of 8085 microprocessor 8085 is a 40 pin ic, the signals from the pins can be grouped as follows power supply and clock signals. The entire group of instructions that a microprocessor supports is called instruction set. In program 1, eight bit addition instructions are used add and adc and. It is a program controlled semiconductor device ic, which fetches. The time for the back cycle of the intel 8085 a2 is 200 ns. The 8085 has extensions to support new interrupts, with three maskable interrupts rst 7. To find the largest number in an array of data using 8085 instruction set. It is a softwarebinary compatible with the morefamous intel 8080 with only two minor instructions added to support its added interrupt and serial inputoutput features. There can be maximum of 256 input devices and 256 output devices. The 8085 8080aprogramming model includes six registers, one accumulator, and one flag register, as shown in figure. What are the different machine cycles in 8085 microprocessor.
Jun 25, 2019 microprocessors and microcontrollers notes ee8551 pdf free download. The main advantages of 8085 were its internal clock generator, internal system controller and higher clock frequency. The stack pointer register is again incremented by 1. It has a powerful instruction set and it is capable to providing multiplication and division operations directly. Complete notes of microprocessor with tutorials and solutions. It points to a memory location in readwrite memory, called the stack. A single integrated circuit ic has all the functional components of a cpu namely arithmetic logic unit alu, control unit and registers. The memory address space of the 8085 takes values from 0000h to ffffh. Microprocessor is a central processing unit cpu etched on a single chip. The main components of 8085a are array of registers, the arithmetic logic unit, the encoderdecoder, and timing and control circuits linked by an internal data bus. The intel 8085 is an 8bit microprocessor introduced by intel in 1977. It has 16bit address bus and hence can address up to 216 65536 bytes 64kb memory locations through a a. The 8085 microprocessor is an 8bit processor that includes on its chip most of the logic. If 16bit data are to be stored, they are stored in consecutive memory locations.
Note for microprocessor mp by annapurna mishra lecturenotes. Moorthi published 8085 microprocessor notes find, read and cite all the research you need on researchgate. It has a 16bit data bus, so it can read data from or write data to memory and ports either 16bit or 8bit at a time. S2 s1 s0 characteristics 0 0 0 interrupt acknowledge 0 0 1 read io port 0 1 0 write io port 0 1 1 halt 1 0 0 code access1 0 1 read memory. Its data bus width is 8bit and address bus width is 16bit, thus it can address 2 16 64 kb of memory. A microprocessor is a multipurpose programmable logic device which reads the binary instructions from a storage device called memory accepts binary data as input and process data according. A memory location for intel 8085 microprocessor is designed to accumulate 8bit data. The 8085 microprocessor is an 8bit processor available as a 40pin ic. Today we are with the microprocessor hand written notes specially for the baddi university students. It has 16bit address bus and hence can address up to 216 65536 bytes 64kb memory locations through a0a15. Nmos microprocessor is popular comparator, control unit, binary counter, clock pulse, than pmos as nmos technology is faster and integrator, logic gates, integrated circuits. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. The intel 8085 eightyeightyfive is an 8bit microprocessor produced by intel and introduced in march 1976.
In 1978, intel released the 8086 microprocessor, a year later it released 8088. The 8085 8080a has six generalpurpose registers to store 8bit data. Microprocessor and microcontrollers notes what are microprocessor and microcontrollers. P is a digital electronic component with miniaturized transistors on a single semiconductor integrated circuit ic one or more microprocessors typically serves as a central processing unit cpu in a computer system or handheld device. The chapter wise class notes of microprocessors in pdf files listed below are compiled by er. Programming with 8085 microprocessor internal architecture of 8 bit microprocessor and its registers. The intel 8085a is a new generation, complete 8 bit parallel central processing. You can take this page as the hub of all posts related to microprocessor notes. This page is a repository of class notes for microprocessor 8085, 8086 and microcontroller 8051. Introduction to 8085 microprocessor computer science. Saraswati saha, assistant professor of rcciit, kolkata and uploaded in this site for her engineering students at rcciit.
Intel, introduced 8085 which was an updated version of 8080 last 8bit processor. Intel 8085a is one of the most popular 8bit microprocessors capable. In these microprocessor and microcontroller notes pdf, we will study internal architecture, programming model of intel microprocessors 8086 pentium, and assembly language programming using an assembler. The 8085 processor performs these functions using address bus, data bus and control bus as. The next processor in line was intels 8080 with an 8 bit data bus and a 16 bit address bus. Here are some very well written notes on the subject 8085 microprocessor which were compiled by my friend vishesh during his gate coaching at made easy institute in delhi. Nov 29, 20 microprocessor hand written full notes download. However, it requires less support circuitry, allowing simpler and less expensive microcomputer systems to be built. Adisesha 6 pin diagram and pin description of 8085 8085 is a 40 pin ic, the signals from the pins can be. Sep, 2019 8085 microprocessor study notes for electronics and communication. Intel 8085 microprocessor architecture signals addressing modes instruction classification instruction settiming diagram alp format programming. Click on corresponding chapter to view related notes.
Jameco electronics electronic components distributor. Object oriented system analysis and design chapter 5 ioe notes. These notes are made as per the syllabus of makaut for 2nd. Arithmetic and logic operations can be directly performed with the io data. Pin diagram of 8085 eazynotes find notes the easy way.
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